California Code, Family Code - FAM § 9202.5

(a) Notwithstanding any other law, the laboratory that is storing a blood sample pursuant to Section 8706, 8817, or 8909 shall provide access to the blood sample to only the following persons upon the person's request:

(b) The birth parent or parents shall be given access to any DNA test results related to the blood sample on request.

(c) Except as provided in subdivision (b), no person other than the adoptive parent and the adopted child shall have access to the blood sample or any DNA test results related to the blood sample, unless the adoptive parent or the child authorizes another person or entity to have that access.